Senior System Administrator - Migration and Modernization
Visa Sponsorship
AI Summary
Support the migration and modernization of end-of-life systems, including legacy Windows and Red Hat Enterprise Linux environments. Develop migration strategies, migrate systems, and ensure security and compliance. 8 years of experience in system administration and migration required.
Key Highlights
Migration and modernization of end-of-life systems
System assessment and planning
Security and compliance
Key Responsibilities
Assess legacy Windows Server (2012 and older) and RHEL 5/6/7 systems
Develop migration strategies with risk assessments, upgrade paths, and timelines
Migrate legacy RHEL and Windows systems to supported versions
Technical Skills Required
Benefits & Perks
Visa sponsorship available
Hybrid work arrangement
Nice to Have
STIG remediation and continuous compliance checks
Experience using OpenSCAP, Nessus, OpenVAS, or other vulnerability/compliance scanning tools
Job Description
Dice is the leading career destination for tech experts at every stage of their careers. Our client, Maddisoft, is seeking the following. Apply via Dice today!
Maddisoft has the following immediate opportunity, let us know if you or someone you know would be interested. Send in your resume ASAP. - U.S. Citizens and those authorized to work in the U.S. are encouraged to apply. Send in resume along with LinkedIn profile without which applications will not be considered. Call us NOW! ***Visa sponsorship is available for this position.
Job Title: Support System Administrator
Location: Austin, TX (Hybrid)
Interview Mode: Through Microsoft Teams
Position Overview
The Support System Administrator will support migration and modernization of end-of-life systems, including legacy Windows and Red Hat Enterprise Linux environments. The role focuses on upgrading systems to supported OS versions through fresh installs/reinstallation as the primary method, with in-place upgrades only as a last resort, to improve security, performance, and operational continuity.
Key Responsibilities
System Assessment & Planning
- Assess legacy Windows Server (2012 and older) and RHEL 5/6/7 systems.
- Prioritize migration based on system criticality, security risk, and operational needs.
- Develop migration strategies with risk assessments, upgrade paths, and timelines.
- Migrate legacy RHEL and Windows systems to supported versions, including RHEL 8/9 and Windows Server 2022/2025.
- Perform reinstallation as the primary upgrade approach; use in-place upgrades only as a last resort.
- Implement data backup and recovery strategies before, during, and after migration.
- Validate post-upgrade functionality, including performance, compatibility, services, and networking.
- Reconfigure system services and settings after OS upgrade.
- Use Ansible for RHEL and PowerShell for Windows to maintain consistency.
- Write and maintain automation scripts for repetitive tasks across Windows and Linux.
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- Perform system hardening before and after migration.
- Apply patches and updates to bring systems to current patch levels.
- Run vulnerability scans and remediate issues discovered during migration.
- Ensure compliance with internal policies and standards such as CIS Benchmarks, NIST, and STIGs.
- Serve as the escalation point for migration issues, especially on legacy RHEL 5/6 and older Windows systems.
- Provide post-migration support for system, performance, and compatibility issues.
- Troubleshoot OS-level and application-level problems to maintain high availability.
- Maintain detailed migration documentation, including steps taken, configuration changes, and issues resolved.
- Update system configuration records in the CMDB and TRP list.
- Provide regular progress reports on status, challenges, and milestones.
- Work with networking, database, and application teams for smooth integration.
- Coordinate with vendors for legacy or proprietary system issues.
- Communicate downtime, changes, and disruptions to stakeholders and end users.
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- Create internal documentation and user manuals for updated systems.
- Share lessons learned to support future migration efforts.
- Ensure backup solutions are in place for Windows and RHEL systems.
- Update disaster recovery plans and test recovery procedures after migration.
- Conduct post-migration audits to confirm systems are functional, secure, and compliant.
- Identify opportunities for optimization and additional enhancements.
- 8 years hands-on upgrades of systems for both Windows and RHEL.
- 8 years RHEL and Windows OS administration, upgrade, migration, and modernization experience.
- Experience with RHEL 5/6/7/8/9 and Windows Server 2008-2022.
- Proficiency in system administration for Linux and Windows environments.
- Advanced troubleshooting skills for legacy systems.
- Experience with in-place upgrades and fresh installs for RHEL and Windows systems.
- Familiarity with configuration management tools such as Ansible, PowerShell, and SCCM.
- Proficient in system automation and scripting using Bash, PowerShell, and Ansible.
- Strong security knowledge, including patch management, system hardening, and vulnerability scanning.
- Experience with backup and recovery solutions.
- Experience with virtualization technologies such as VMware.
- Experience with STIG-based hardening for RHEL and Windows systems.
- Experience with audit log management, vulnerability remediation, and automated compliance enforcement.
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- Experience with STIG remediation and continuous compliance checks.
- Experience using OpenSCAP, Nessus, OpenVAS, or other vulnerability/compliance scanning tools.
- Experience automating hardening and remediation using Ansible, Puppet, or PowerShell.
- Experience supporting virtual machine-based upgrades, as the majority of systems are VM upgrades.
- Migration plans and timelines for legacy systems.
- Weekly upgrade plans scheduled through change control.
- Backup and disaster recovery strategies.
- Post-migration configurations and updates.
- Regular migration status reports and post-migration review reports.
- System documentation, SOPs, and internal training materials.
- Minimum of 3 servers per week to be addressed for conversion through planning, testing, and delivery.
- Expected minimum of 1 EOL system converted/lifted per week per FTE through change control.
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